Psychedelic rock band known for their hit In-A-Gadda-Da-Vida. During the initial recordings, the lyric was "In the garden of eden", but the line changed due to the frontman's slurred speech. The album and live versions are over ten minutes long. They are credited with inventing "stoner metal", a fusion of hard rock and psychedelic rock considered the original heavy metal. Their name being Iron Butterfly is considered related to this. Despite their significance they have yet to even be nominated for the Rock and Roll Hall of Fame.